ANH 10/10
ESB 9/10
ROTJ 7/10
TPM 6/10
ATOC 3/10
ROTS 5/10
It is really to tough to rate ANH and ESB. ESB is my favorite movie of the series and I think its plot, production values, directing, acting, effects etc. are all better, but ANH had a much higher impact on me, so I rate it higher.
I also like TPM for the most part. It has many flaws, but to me is about the level of ROTJ.